Wire drawing block



July 94. 5. J. PAQHL.

WIRE DRAWING BLOCK Filed May' 14, 1945 Patented July 27, 1948 UNITED STATES. PATENT oFF-ici: ,rfrrsfrrm Applicatioichliaazn, lo. 583.813

l This invention relates to an improved stripper block for drawing wire. s

One o! the objects o! the invention is the provision of a. stripper block in which the stripper pins are locked in position by means of an improved locking means. l

Alurtherobject of the invention is the provision of anv improved stripper bloei; which is sim- '.ple and inexpensive in its construction and which is emcient, effective, and safe in its use.

'These and other objects oi the invention will become more fully apparent in the following .specidcation The invention will be more readily understood by reference to the accompanying drawings, in

l.stripper pins, said section being taken along the line Uil-HI in Figure 2.

ln the patent to Zettergren, No. 2,327,149, dated August 17, 1943, there is disclosed a wire drawing stripper block provided with lock-ing means for retaining the stripper pins therein. In the Zettergren construction, such locking means is in the nature oi a bayonet lock, there being a vertical slot in the side wall of the stripper pin receiving s hole in the bloclr to ,receive a projecting lug on the stripper pin, such vertical slot being connected at the bottom thereof with an L-shaped slot so that the lug on the pin may be received in the end of the L-slot when the stripper pin is pressed downwardly against the spring in the pin receiving hole and is turned in the proper direction. Although such bayonet locking means has proved to retain thestripper pins satisfactorily during operation of the stripper block, it has been found somewhat dimcult to operate and the drawing block incorporating it has been expensive vto mmuii'acture.h When the stripper pin is inserted in the hole in the stripper block it must be turned until the'lug enters the vertical slot. Furthermore, once in the hole the pinV must be turned in the rightdlrection so that the lug enters the L- shaped slot in order to lock it in the block. Both such operations are bothersome and time consuming. Furthermore, the machining of the vertical slot and the L-shaped slot in the side wall of the pin receiving hole in the stripper lili 2 block must be carefully done and involves the use of special tools, thus adding considerably to the total cost of the stripper block.

The improved stripper blocl: or the present invention employs a locking means ol such character that the stripper pins may be insertedinto the hole therein in any angular relationship and. in which the pin may be locked when inserted toits lull depth by being turned, if necessary, in either direction. Furthermore, because or its simplicity and because it necessitates only a simple cutting omration on the block, which may be performed from outside the pin receiving openings, the use of such improved locmng means adds but little to the total cost oi a strippeiiblocir.

Referring more particularly to the drawings, the improved wire drawing bloclr or my invention consists ci a circular stripper bloclt il having a smaller circulariy arranged danse portion d disposed on one side thereof. The stripper block vis.

v provided with a central hole t having a longitudinally extending key-way t in the wail thereof. A shaft it is adapted to be inserted inthe hole t and to be keyed thereto by means or a key i 2 in the key-Way il.

Around the hangs portion it of the stripper bilr t there is disposed a plurality oi' equally spaced semi-circular bosses it, as shown in Figure 1. Each boss is provided with an upright hole it for the reception of' the lower end of a stripper pin it, the upper end or which is provided with an enlargement to prevent the escape of wire thereover, such enlargement in the modification shown being provided by bending ythe upper end of the pin in the form of a ring t.

The inner face of each of the bosses it is provided with a horizontal slot 22 as shown in Figure 2. Such siotmay be easily made by the use oi' a milling tool with its axis parallel to the axis of shaft it. Slots 22 receive locking ring it which is formed of fiat stool: bent into the rorm of 'an open ring. Ring 2t is retained in its outward position by meansv of compression spring 2t which is received over the open ends of ring and is held under compression by means of bolts 2t through the ends of the ring.

Each stripper pin i8 is provided, es shown in Figures 2 and 3, withtwo opposite atted portions llt, at a location an appropriate distance from the bottom of the pin, and w?" n. a conical lower end 32. Such construction allows the easy' introduction of a stripper pin into the block, the locking thereof, and the unlocking and removal of the pin in a manner which is correspondingly simple. Pin Il is inserted into a. vacant hole Il, without regard to its angular disposition, and is then thrust downwardly, until the tip of end 12 contacts the lower end of the hole I8. Should it happen that the pin is in a correct position an` gularly so that one of the flatted portions 32 confronts the spring ring 24, the ring will snap into the fiatted portion and the pin will be automatically locked. If, however, pin i8 is inserted with such angular disposition that the ring 26 rides up over point 32 and onto the rounded portion 34 between the slots 30, it will be necessary to turn pin I8 either to the right or to the left until one of the fiatted portions confronts the spring ring so that the ring falls into the slot and locks the pin.

Removal of the pin when so locked is` accomplished by turning the pin a quarter turn so that the spring ring 2d rides up onto the rounded portion 3l. The pin then may be removed merely by pulling it axially from hole le. It will be appreciated from the above description that the locking means of my improved stripper block results in greatly simplified operations in its insertion, locking, unlocking, and withdrawal and that construction of the block is much simpler than those of prior art devices. i

Having thus fully disclosed the manner of construction and operation of my improved wire drawing block, I desire to claim as new the following.

I claim:

l. A wire drawing block comprising a wire receiving body rotatable about an axis, the body having a plurality of holes directed generally parallel to the axis of rotation of the block and arranged therein on one side thereof on a circle concentric with the axis of rotation of the body, a plurality of removable pin-like members with one adapted to be disposed in each of said holes, each of said pin-like members having means on the bottom portion thereof cooperating with means adjacent the bottom of the hole in the body selectively to lock the pin-like member in the body or to release it therefrom, said locking means comprising at least one open sided socket in each pin-like member and a spring-pressed locking ring for reception into the sockets in the members, said locking ring being supported coaxially on the body of the wire drawing block so ,50

as to be heid from movement axially of the body and so that portions of'it lie in the paths of the pin-like member in the holes ixi the absence of such members, the locking ring having peripheral and bottom surfaces shaped for interaction with the sockets in the pin-like members to lock such members in the holes.

2. A Wire drawing block comprising a wire receiving body rotatable about an axis, the body having a plurality of holes directed generally parallel to the axis of rotation of the block and arranged therein on one side thereof on a circle concentric with the axis of rotation of the body, a plurality of removable pin-like members with `one adapted to be disposed inl each of said holes,

ring being supported coaxialiy on the body of the wire drawing block so as to be held from movement axially of the body and so that portions bi it lie in the paths of the pin-like member in the holes in the absence of such members, the lock-J ing ring having a bottom surface lying at least substantially in a plane at right angles to the axes of the holes for interaction with the bottom walls of the socket in the pin-like members to lock such members in the holes.

3. A wire drawing block comprising a wire receiving body rotatable about an axis, the body having a plurality of holes directed generally parallel to the axis of rotation of the block and arranged therein on one side thereof on a circle concentric with the axis of rotation of the body, a plurality of removable pin-like members with one adapted to be disposed in each of said holes, each of said pin-like members having means on the bottom portion thereof cooperating with means adjacent the bottom of the hole'in the body selectively to lock the pin-like member in,-

the body or to release it therefrom, said locking means comprising at least one open sided socket in each pin-like member, said socket having a, bottom wall which lies at least substantially in a plane at right angles to the axis of the member, and a spring-pressed locking ring for-reception into the sockets in the members, said locking ring being supported coaxially'on the body of the wire drawing block so as to be held from movement axially of the body and so that portions of it lie in the paths of the pin-like member in the holes in the absence of such members. the locking ring having a bottom surface lying at least substantially in a plane at right angles to the axes of the holes for interaction with the bottom walls of the socket in the pin-like members to lock such members in the holes, the spring-pressed locking ring comprising an open ended ring of rectangular cross section, a compression spring acting between the ends thereof, and means on the ends of the ring between which the spring acts to urge the ring to expanded condition.

4. A wire drawing block comprising a wire receiving body, said body having a bottom portion ofgeneraliy disc-shape and an upper portion in the form of a circular flange afxed to the discshaped lower portion and concentric therewith, the body being rotatable about an axis concengtric with the upper and lower portions thereof, a

plurality of bosses spaced about the inner surface,

of the circular ange, each boss being provided with a hole therein generally parallel to the axis of the flange, each boss having a horizontal slot through its inner face communicating with the hole therein, the slots in the several bosses lying in a plane transverse to the axis of rotation of the body, a plurality of removable pin-like members with one adapted to be -disposed in each of said holes in the bosses, each of said pin-like members having means on the bottom portion thereof cooperating with means adjacent the bottom of the hole selectively to lock the pin-like member in the body or to release it therefrom, said locking means comprising at least one open sided socket in the pin-like member, said socket having a bottom wall which lies at least substantially in a plane at right angles to the axis of the member, and a spring-pressed locking ring extending into each of the slots in the bosses for reception into the socket in the member in each hole, said locking ring being so disposed as to lie in the paths of the pin-like members in the holes in the absence of such members, the locking ring having a bottom vsurface lying at least substantially in a plane `at right angles to the axes of the holes for interaction with the bottom walls of the socket in the pin-like members to lock such members in the holes.

5. A wire drawing block comprising a wire receiving body, said body having a bottom portion of generally disc-shape yand an upper portion in the form of a circular flange aillxed to the discshaped lower portion and concentric therewith,`

the body being rotatable about an axis concentric with the uppery and lower portions thereof, a plurality of bosses spacedY about the inner surface of the circular ilange, each boss being provided with a hole therein generally parallel to theaxis of the flange, each boss having a horizontal slot through its :inner face communicating with the hole therein, the slots in the several bosses lying in a plane transverse to the axis of rotation of the body, a plurality'of removable pin-like members with one adapted to be disposed in each of said holes in the bosses, .each of said pin-like members having means on the bottom portion thereof cooperating withvmeans adjacent the bottom of the hole selectively to lock the pinlike member in the body or to release it therefrom, said locking means comprising at least one open sided socket'in the pin-like member, said socket having a bottom wall which lies at least substantially in a plane at right angles to the axis of the member, and a spring pressed locking ring extending into each of the slots in the bosses for reception into the socket in the member in each hole, said lockingvring being so disposed as to lie in the paths of the pin-like members in the holes in the absence of such members, the locking ring having 'bottom surfaces lying at least substantially in a plane at right angles to the axis of the holes for interaction with the bottom walls of the socket in the pin-like members to lock such members in the holes, the spring-pressed locking ring comprising an open ended ring'of a rectangular cross section, a compression spring acting between the ends thereof,

and means on the ends of the ring between which the spring acts to urge the ring to expanded condition.

6. A wire drawing block comprising a wire receiving body, said fbody having a bottom portion of generally disc-shape and an upper portion,

in the form of a circular nange afilxed to the disc-shaped lower portion and concentric therewith, the body being rotatable about an axis concentric with the upper and lower portions thereof, a plurality of bosses spaced about the inner surface of the circular flange, each boss being provided with a hole therein generally parallel/ to.

said locking means comprising at least one open sided socket in the pin-like member, said socket lhaving a bottom Wall which lies at least substantially in a plane at right angles to the axis of 20 the member, and a spring-pressed locking ring extending into each of the slots in the bosses for reception into the socket in the member in` each hole, said locking rin'g being so disposed as to lie in the paths of the pin-like members in the holes in the absence of such members, the locking ring having bottom surfaces lying at least substantially in a plane at right angles to the axis of the holes for interaction with the bottom walls ofthe socket in the pin-like members to lock such members in the holes, the springpressed locking ring comprising an open ended ring of a rectangular cross section, a 'compression spring acting between the ends thereof, and y means on the ends of the ring between which the u spring acts to urge the ring to expanded condition, the slotsin each boss being of substantially the same height, the locking ring being of such height as to nt closely within such slots.

STEPHEN J. PACHL.

REFERENCES CITED .The following references are of record in the ille of this patenti UNITED STATES PATENTS Number Name ,t Date 885,392 Spets Apr, 21, 1908 1,579,373 i Lauren Apr. 0, 1926 1,682,393 Mead Aug. 20, 1928 f 5o 1,802,053 Halborg Apr. 21., 1931 1,809,237 Halborg June 9, 1931 2,227,796 

